A number, y, is equal to the difference of a larger number and 3. The same number is one-third of the sum of the larger number and 9. Which equations represent the situation? Ox+y = 3 and x-3y=-27 Ox+y = 3 and x-3y=-9 x-y = 3 and x-3y=-27 O X-y=3 and x-3y=-9